1) Hydrographical 2) Oceanography 1) Hydrographical 
• (a.) Alt. of Hydrographical
[adj] - of or relating to the science of hydrography
hydrographic 1. The scientific description and analysis of the physical conditions, boundaries, flow, and related characteristics of the earth's surface waters. 2. The mapping of bodies of water.
Referring to the arrangement and movement of bodies of water, such as currents and water masses 
hydrographical adjective of or relating to the science of hydrography